Spark arrester



(2. D. WRIGHT SPARK ARRESTER Jul 24, 1923..

iled Feb. 18, 1922 Patented July 24, 1923.

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CHARLES 1). Warsaw, or SAN raaucrsoo, CALIFORNIA, ASSIGNOR or ONE-HALFare I CARL e. rnnrz, or salt FRANCISCO, CALIFORNIA.

SPARK ARBES'IER.

Application filed February 18, 1922. Serial No. 587,562.

To all whom it may concern:

.Be it known that I, CHARLES D. WRIGHT, a citizen of the United States,residing at San Francisco, in the county of San Francisco and State ofCalifornia, have invented new and useful Improvements in Spark Arresters, of which the following is a specification.

The present invention relates to improve ments in spark arresters foruse in connection with the stacks, chimneys or flues of furnaces,garbage incinerators and like structures wherein the products ofcombustion are carried off thru a flue or chimney and the primary objectis to provide a simple, inexpensive and efficacious construction whichwill positively prevent Cinders. sparks and the likefrom being carriedout thru the flue with the smoke and which will cause the arrestedsparks, cinders and the like to be deposited'into a receptacle fromwhich they may be removed from the apparatus in a cleanand eflicaciousmanner.

A further object is to provide a spark arrester of the characterdescribed which is constructed so that it will not only arrest sparks,Cinders and the like, but may be used to clarify black heavy smoke,whereby soot and the like resulting from combustion of refuse and fuelwill be prevented from beingdeposited upon the roofs and from beingscattered in the vicinity of the stack or flue.

Referring to the drawings, the figure represents a vertical sectionalview of the apparatus of this invention.

The preferred form of my invention illustrated in the accompanyingdrawing comprises an upright flue or stack 1, leading from a furnace orincinerator and having a damper 2 therein. Connected with the upper endor the flue 1 by an elbow 3 is a short horizontally extending fluesection l, to the upper end of which a vertical flue section 5 isconnected. The flue section 5 is thus connected at a point substantiallycentral of its ends whereby the section 5 has portions of equal lengthdisposed above and below the section 4. The section at is provided inits upper side and adjacent its outer end with a bafile plate 6 whichextends downwardly and forwardly from the upper side of the section 4,so that its forward end terminates substantially flush with the forwardend of the section 4, and spaced above the lower side of the section 4 adistance approximately one-half of the diameter of said flue section.This baflie may have a re. inforcing or bracing plate or strip 7extending from the forward lower edge thereof upwardly to the upper sideof the section 4. Extending in the same plane as the baflle and acrossthe flue section 5 is a piece of.

wire screen 8. The baflle 6 and screen 8 extending entirely across thesections l and 5 are so arranged that as the products of combustion passthru the flue 4, they will be deflected downwardly and outwardly fromthe flue i and immediately brought under the screen 8. The screen 8 willcause the sparks and heavier products of combustion to be separated fromthe lighter particles,' such as the smoke, and the smoke will assupwardly in the section 5 and out thru the upper end thereof. A cleanout opening 9 is provided in the section 5 above the screen and isclosed by a sliding door 10, said opening being arranged to permit ofthe brushing or cleaning of the screen from above. The Cinders and heavyparticles of combustion will drop into the lower part of the section 5,said section 5 having a closed lower end 11. The end 11 is adapted torest upon a suitable support 12, whereby port the damper in a variety ofpositions and regulate the size of the opening thru the flue section 16,the pin being adapted to rest upon the upper side of said section whensupporting the damper. The outer end of the flue section 16 is adaptedto extend thru an opening 20 formed in one side wall of a substantiallyrectangular refuse receptacle 21. The receptacle 21 is adapted to restupon the support 12 and in the wall thereof opposite to the wall havingthe opening 20, is provided with a corresponding opening 22 having asliding door 23 normally closing the same. The receptacle is held inplace by a hook 24 attached to, the flue 5 and adapted to engage in aneye 25Hon the receptacle.

In the operation of the appartus, when the. products of combustion, onaccount of thebaflie 6, are defiecteddownwai'dly and forwardly into theflue section 5 beneath the screen 8, the heavy particles, such ascinders and sparks, will drop into the lower and of the section 5. Ifthe, door 23 is opened slightly, a down draft may be created and theheavy particleswill be drawn into the receptacle 21. The verticalsection 5, in being. connected centrally of its ends with the flue 4:,will balance the draft within the said section 5 so that the smoke andproducts ofycombustion do not have a tendency to immediately rise andpass out of the section 5 into the atmosphere. The heavy particleswillnot be influenced, dueto the balanced draft, upwardly and willfreely gravitate intoithe member 5. Another point of advantage isthatwhen heavy black smoke is conducted into the section 5 instead ofpassing immediately outof said section it will be iInOVBCl downwardly orbe retained in said -adiate updraft in the section 5 and to provide,

if desired, a down draft in said flue section.

With reference to the foregoing description and accompanying drawing, itwill be seen that I have provided an extremely simple and inexpensivespark arrester, which will not only arrest sparks, cinders, pieces ofpaper and the like, and prevent scattering and accumulations of theseparticles in the vicinity immediate to the. flue, but will serve also asa smoke clarifier.

I claim: v

1. A spark arrester embodying in its construction a fine section thruwhich products of combustion from a furnace and the like are adapted topass, an upright flue section having communication at a pointintermediate of its ends with one end of said first named section beingopen at its upper end and closed atits lower end, a battle memberextending downwardly andforwardly from the upper side of the first namedflue section to a point where said section is connected with the uprightsection, and a screen extending from said baffle member so as to lie inthe path of the products of combustion risingin said upright section. a

2. A spark arrester embodying in its construction a flue section thruwhich products of combustion from a furnace and the like are adapted topass, an upright flue section having communication at a pointintermediate of its ends with one end of said first'named section beingopen at its upper end and closed at its lowerend, a baflie memberextending downwardly and forwardly from the upper side of the firstnamed flue section to a point where said section is connectedwith theupright section, a screen extending from said bafflemember so as to liein the path of the products of combustion rising in said uprightsection, said upright section having an opening adjacent its lower endand a slidable closure for said opening. 7 a. a

CHARLES D. WRIGHT.

